303rd Engineering Group is a St. Louis-based engineering firm, located in the historic
Benton Park neighborhood.

The 303rd Engineering Group is a St. Louis-based professional engineering firm offering
services for mechanical/HVAC, electrical and plumbing design. With clients from both
the public and private sector, our project types include government, healthcare,
commercial, industrial, residential and institutional. The company was started in
2005 by Charles K. Fiedler, a professional engineer with over 30 years of experience
in consulting electrical engineering.

Who We Are

Since 2005, the 303rd has logged over 400 successful projects, 85% of them
for repeat customers. As a full-service MEP firm, the 303rd provides engineering
expertise for the following:

Successful Partnerships, Successful Projects

Architects

Design/Build Contractors

Government Agencies

Whatever the size or scope of your project, the 303rd can handle it. Past high-profile
jobs include the Naval Special
Weapons facility in Crane, Indiana; new campground facilities and Visitor’s Center
at Johnson Shut-Ins State Park, Missouri; hospitals for the Missouri Department of
Mental Health, and the Cancer Treatment Center in Swansea, Illinois. In addition,
we have provided engineering design for numerous churches, libraries, schools, commercial
buildings and assisted-living facilities throughout Missouri and Illinois.